<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        let promise = new Promise(function (resolve, reject) {
            // reject();
            resolve(1);
            setTimeout(() => resolve(2), 1000);
        });
        promise.then((data) => {
            console.log('hello', data);
        });
    </script>
</body>

</html>